• Location: Queretaro, Mexico
• Weight (with stand): 10g
• Dimensions: 1.8 x 1.8 x 1.6 cm
• DETAILED DESCRIPTION

Fire opals, primarily from Mexico, are a particular variety of mineral known for their vibrant colorations in shades of red, orange, yellow, and sometimes green. These colors are caused by the presence of iron in the opal's mineral structure. This gemstone is an amorphous silica with a variable water content ranging between 3 and 10% by weight, rarely up to 21%. Mexico is one of the main sources of fire opals, especially thanks to the mines in the Querétaro area, discovered in 1835 and still productive today. In this region, opals are extracted from volcanic rocks. Extraction takes place both on the surface and in deeper layers, allowing for high-quality crystals to be obtained. In addition to Querétaro, important deposits are found in the states of Hidalgo, Guerrero, Michoacán, Jalisco, Chihuahua, and San Luis Potosí. Minor deposits are also present in other nations such as the United States (Oregon), Guatemala, Australia, and Canada. Many fire opals exhibit an effect called “opalescence,” which is a play of colors created by the dispersion of light within the gemstone. History and Culture Fire opals have a long history in Mexico and were highly valued by pre-Columbian civilizations such as the Aztecs and Mayans. These cultures considered opals sacred stones and used them in rituals and jewelry. Even today, fire opals are highly sought after and are often used in luxury jewelry. Uses Fire opals are very popular in the jewelry sector due to their beautiful colors and optical effects. They are often set in rings, earrings, necklaces, and other ornaments. Due to their beauty and rarity, they are also appreciated by collectors. Care and Maintenance Fire opals are sensitive to changes in temperature and humidity, which can affect their stability and appearance. It is advisable to avoid sudden temperature fluctuations, not expose opals to excessive humidity or dryness, and clean them with a soft cloth, avoiding chemicals that could damage their surface.